Weathering Process of In Situ Granite and Particle Breakage Characteristics of Compacted Weathered Granite

According to the definition of Hardin [14], the desired integration of the breakage potential (Bp), shown as the hatched areas in Figure 2, can be given by Bp=∫01bpdf, where df is a differential of percentage of particles passing divided by 100. According to the standard heavy compaction method [24], the maximum dry densities of red-brown, yellow-brown, and gray samples were 2.13, 2.25, and 2.18 g/cm3, respectively, and the optimum moisture contents were 6.1%, 6.2%, and 5.9%, respectively. From the stress–strain curve of samples in this study, it can be seen that when the axial strain reached 15%, the residual strength of the specimen under different confining pressures reached its constant value. [...]when the axial strain reached 15%, the triaxial tests were forced to stop, and then the sieving tests were performed. The reasonable particle size distribution (e.g., intergranular locking structure) can reduce the potential of particle breakage of coarse-grained soil similar to weathered granite and improve the stability of subgrade filled with coarse-grained soil. 3. Because different minerals have different strength and hardness, the mineral composition and content in weathered granite have a significant effect on the particle breakage characteristics of compacted weathered granite.